carbon
c.
oxygen
b.
phosphorus
d.
hydrogen
13.
Which of the following is (are) true about the carbon atoms present in all organic molecules?
a.
They were incorporated into organic molecules by plants.
b.
They were processed into sugars through photosynthesis.
c.
They are ultimately derived from carbon dioxide.
d.
A, B, and C are correct.
e.
Only A and C are correct.
14.
If 128 molecules of glucose were covalently joined together in sequence, the single molecule that would result would be a
a.
monosaccharide.
d.
polysaccharide.
b.
polypeptide.
e.
disaccharide.
c.
polyunsaturated lipid.
15.
Which of the following is not one of the four major groups of macromolecules found in living organisms?
a.
glucose
d.
proteins
b.
carbohydrates
e.
nucleic acids
c.
lipids
16.
Which of the following are polysaccharides?
a.
glycogen
d.
A and B only
b.
starch
e.
A, B, and C
c.
chitin
17.
Which of the following is (are) true for the class of large biological molecules known as lipids?
a.
They are insoluble in water.
b.
They are an important constituent of cell membranes.
c.
They contain twice as much energy as an equivalent weight of polysaccharide.
d.
Only A and B are correct.
e.
A, B, and C are correct.
18.
Polysaccharides, lipids, and proteins are similar in that they
a.
are synthesized from monomers by the process of hydrolysis.
b.
are synthesized from monomers by dehydration reactions.
c.
are synthesized as a result of peptide bond formation between monomers.
d.
are decomposed into their subunits by dehydration reactions.
e.
all contain nitrogen in their monomer building blocks.
19.
All of the following molecules are proteins except
a.